Coa substrate, liquid crystal display panel and liquid crystal display device

Abstract

A COA substrate is provided. The COA substrate includes a substrate, a metal layer, a thin-film transistor, a color filter, a transparency electrode, and a spacer. The color filter herein has a plurality of through holes disposed thereon. The spacer is disposed in a corresponding region of the through hole of the color filter. The present invention can better avoid the vacuum bubbles arising in the liquid crystal layer by disposing the spacer in the region of the through hole, thereby enhancing the image display quality of the liquid crystal display panel.

What is claimed is: 
     
         1 . A COA substrate, comprising:
 a substrate;   a metal layer disposed on the substrate, utilized to form a data line for transmitting data signals and a scanning line for transmitting scanning signals;   a thin-film transistor disposed on the substrate, utilized to transmit the data signals to a transparency electrode under control of the scanning signals;   a color filter disposed on the metal layer and the thin-film transistor, utilized to transform an incident light into an emergent light with various colors, and having a plurality of through holes;   the transparency electrode disposed on the color filter and coupled to the thin-film transistor via the through hole; and   a spacer disposed in a corresponding region of the through hole of the color filter, utilized to keep a distance between the COA substrate and a corresponding substrate.   
     
     
         2 . The COA substrate according to  claim 1 , wherein a projection of the spacer on the substrate covers a projection of the through hole on the substrate. 
     
     
         3 . The COA substrate according to  claim 2 , wherein a projected area of the spacer on the substrate is slightly larger than a projected area of the through hole on the substrate. 
     
     
         4 . The COA substrate according to  claim 1 , wherein the color filter includes a green color resist, a green color resist, a blue color resist, and a black color resist. 
     
     
         5 . A liquid crystal display panel, comprising a COA substrate, a corresponding substrate, and a liquid crystal layer disposed between the COA substrate and the corresponding substrate;
 wherein the COA substrate comprises:   a substrate;   a metal layer disposed on the substrate, utilized to form a data line for transmitting data signals and a scanning line for transmitting scanning signals;   a thin-film transistor disposed on the substrate, utilized to transmit the data signals to a transparency electrode under control of the scanning signals;   a color filter disposed on the metal layer and the thin-film transistor, utilized to transform an incident light into an emergent light with various colors, and having a plurality of through holes;   the transparency electrode disposed on the color filter and coupled to the thin-film transistor via the through hole; and   a spacer disposed in a corresponding region of the through hole of the color filter, utilized to keep a distance between the COA substrate and a corresponding substrate.   
     
     
         6 . The liquid crystal display panel according to  claim 5 , wherein a projection of the spacer on the substrate covers a projection of the through hole on the substrate. 
     
     
         7 . The liquid crystal display panel according to  claim 6 , wherein a projected area of the spacer on the substrate is slightly larger than a projected area of the through hole on the substrate. 
     
     
         8 . The liquid crystal display panel according to  claim 5 , wherein the color filter includes a green color resist, a green color resist, a blue color resist, and a black color resist. 
     
     
         9 . A liquid crystal display device, comprising a backlight source and a liquid crystal display panel; wherein the liquid crystal display panel comprises a COA substrate, a corresponding substrate, and a liquid crystal layer disposed between the COA substrate and the corresponding substrate;
 wherein the COA substrate comprises:   a substrate;   a metal layer disposed on the substrate, utilized to form a data line for transmitting data signals and a scanning line for transmitting scanning signals;   a thin-film transistor disposed on the substrate, utilized to transmit the data signals to a transparency electrode under control of the scanning signals;   a color filter disposed on the metal layer and the thin-film transistor, utilized to transform an incident light into an emergent light with various colors, and having a plurality of through holes;   the transparency electrode disposed on the color filter and coupled to the thin-film transistor via the through hole; and   a spacer disposed in a corresponding region of the through hole of the color filter, utilized to keep a distance between the COA substrate and a corresponding substrate.   
     
     
         10 . The liquid crystal display device according to  claim 9 , wherein a projection of the spacer on the substrate covers a projection of the through hole on the substrate. 
     
     
         11 . The liquid crystal display device according to  claim 10 , wherein a projected area of the spacer on the substrate is slightly larger than a projected area of the through hole on the substrate. 
     
     
         12 . The liquid crystal display device according to  claim 9 , wherein the color filter includes a green color resist, a green color resist, a blue color resist, and a black color resist.